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Spontaneous oxygen isotope exchange between carbon dioxide and\nnatural clays: Refined rate constants referenced to TiO2 (anatase/rutile)

SYSNO ASEP	0466724
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Spontaneous oxygen isotope exchange between carbon dioxide and natural clays: Refined rate constants referenced to TiO2 (anatase/rutile)
Author(s)	Knížek, Antonín (UFCH-W)_{ORCID, RID, SAI} Zukalová, Markéta (UFCH-W)_{RID, SAI, ORCID} Kavan, Ladislav (UFCH-W)_{RID, ORCID} Zukal, Arnošt (UFCH-W)_RID Kubelík, Petr (UFCH-W)_{RID, ORCID} Rojík, P. (CZ) Skřehot, P. (CZ) Ferus, Martin (UFCH-W)_{ORCID, RID} Civiš, Svatopluk (UFCH-W)_{RID, ORCID, SAI}
Source Title	Applied Clay Science. - : Elsevier - ISSN 0169-1317 Roč. 137, MAR 2017 (2017), s. 6-10
Number of pages	5 s.
Language	eng - English
Country	NL - Netherlands
Keywords	clay ; carbon dioxide ; FTIR spectroscopy
Subject RIV	CF - Physical ; Theoretical Chemistry
OECD category	Physical chemistry
R&D Projects	LD14115 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	GA14-12010S GA ČR - Czech Science Foundation (CSF)
	GA13-07724S GA ČR - Czech Science Foundation (CSF)
	LM2015073 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Institutional support	UFCH-W - RVO:61388955
UT WOS	000393002300002
EID SCOPUS	85002976451
DOI	10.1016/j.clay.2016.11.031
Annotation	In a series of our previously published papers, we reported a broad range of experiments and theoretical studies devoted to the interaction of carbon dioxide with the anatase titania surface. In the current study, we demonstrate oxygen mobility between gaseous carbon dioxide and solid natural clay minerals. This surprising feature implies that such behaviour is typical not only for titania but also for oxides with different chemical composition and structure. The oxygen mobility was demonstrated by the interaction of isotopically labelled carbon dioxide – C18O2 – with the mineral surfaces. In most cases, we observed rapid oxygen exchange between the gas and the mineral. It was therefore discovered that carbon dioxide is more active than was previously thought because it exchanges its oxygen atoms with inorganic surfaces. Moreover, this feature seems to be very significant in natural clays of various compositions. This finding points not only towards high activity of CO2 but also towards high surface reactivity of clays, which are quite common surface minerals on Earth and other planets.
Workplace	J. Heyrovsky Institute of Physical Chemistry
Contact	Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
Year of Publishing	2018

Number of the records: 1